Hidden 19th Century Simple InnovationsSize: 9Difficulty: easyForgotten Inventions of the 19th CenturyPerfect for beginners with simple, common vocabulary
19th Century Lost Tech TreasuresSize: 8Difficulty: easyForgotten Inventions of the 19th CenturyPerfect for beginners with simple, common vocabulary
Arcane Engines and Obscure ApparatusSize: 8Difficulty: hardForgotten Inventions of the 19th CenturyChallenging puzzle for experienced crossword solvers
Silent Marvels of Nineteenth Century TechSize: 19Difficulty: mediumForgotten Inventions of the 19th CenturyModerate difficulty suitable for most players
Hidden Gems of 19th Century TechSize: 8Difficulty: easyForgotten Inventions of the 19th CenturyPerfect for beginners with simple, common vocabulary